Dual fluidized bed biomass steam gasification generates a high calorific, practically nitrogen-free product gas with a volumetric H₂ content of about 40%. Therefore, this could be a promising route for a polygeneration concept aiming at the production of valuable gases (for example H₂), electricity, and heat. In this paper, a lab-scale process chain, based on state of the art unit operations, which processed a tar-rich product gas from a commercial dual fluidized bed biomass steam gasification plant, is investigated regarding H₂ production within a polygeneration concept. The lab-scale process chain employed a water gas shift step, two gas scrubbing steps, and a pressure swing adsorption step. During the investigations, a volumetric H₂ concentration of 99.9% with a specific H₂ production of 30 g kg⁻¹ biomass was reached. In addition, a valuable off-gas stream with a lower heating value of 7.9 MJ m⁻³ was produced. Moreover, a techno-economic assessment shows the economic feasibility of such a polygeneration concept, if certain feed in tariffs for renewable electricity and H₂ exist. Consequently, these results show, that the dual fluidized bed biomass steam gasification technology is a promising route for a polygeneration concept, which aims at the production of H₂, electricity, and district heat.

双流化床生物质蒸汽气化可产生高热量，几乎无氮的产品气，其H ₂的体积含量约为40％。因此，这对于以产生有价值的气体（例如H ₂），电和热为目的的多联产概念可能是一条有希望的途径。在本文中，基于多联产概念中的H ₂生产，研究了基于规模的单元操作水平的实验室规模的工艺链，该工艺链处理了来自商业双流化床生物质蒸汽气化厂的富含焦油的产品气。实验室规模的工艺链采用了水煤气变换步骤，两个气体洗涤步骤和变压吸附步骤。在研究过程中，体积H ₂达到99.9％的H2O2浓度，特定H ₂产生量为30 g kg ^-1生物量。另外，产生了具有较低的热值7.9 MJ m ^-3的有价值的废气流。此外，技术经济评估表明，如果存在可再生电力和H _2的一定价格的电价，则这种多联产概念的经济可行性。因此，这些结果表明，双流化床生物质蒸汽气化技术是多联产概念的有前途的途径，该多联产概念旨在生产H ₂，电和区域供热。